Single hole and vortex excitations in the doped Rokhsar-Kivelson quantum dimer model on the triangular lattice

Article

关键词: VALENCE-BOND STATE;    SUPERCONDUCTIVITY;    DEGENERACY;    STATISTICS;    PHYSICS;    GAS;   

DOI  :  10.1103/PhysRevB.76.172301

来源: SCIE

【 摘 要 】

We consider the doped Rokhsar-Kivelson quantum dimer model on the triangular lattice with one mobile hole (monomer) at the Rokhsar-Kivelson point. The motion of the hole is described by two branches of excitations: the hole may either move with or without a trapped Z(2) vortex (vison). We perform a study of the hole dispersion in the limit where the hole-hopping amplitude is much smaller than the interdimer interaction. In this limit, the hole without vison moves freely and has a tight-binding spectrum. On the other hand, the hole with a trapped vison is strongly constrained due to interference effects and can only move via higher-order virtual processes.

【 授权许可】

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